.page-about {
  display: block;
  color: var(--c-ink);
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: 22px;
  padding-bottom: 6px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 2px solid var(--c-line);
  background:
    radial-gradient(120% 140% at 102% -6%, rgba(255, 122, 26, .16) 0%, transparent 54%),
    radial-gradient(95% 120% at -6% 106%, rgba(37, 226, 212, .18) 0%, transparent 58%),
    linear-gradient(168deg, #0A1016 0%, var(--c-void) 64%);
  padding: clamp(20px, 4vw, 40px) 0 clamp(40px, 6vw, 76px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  right: -14%;
  top: -34%;
  width: min(620px, 80vw);
  aspect-ratio: 1 / 1;
  background: repeating-linear-gradient(118deg, rgba(37, 226, 212, .17) 0 2px, transparent 2px 30px);
  transform: rotate(-6deg);
  opacity: .55;
  pointer-events: none;
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .about-hero__eyebrow {
  margin: 0;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4.4vw, 48px);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(16px, 2.2vw, 24px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7.2vw, 86px);
  line-height: 1.04;
  letter-spacing: -.03em;
  color: var(--c-ink);
}

.page-about .about-hero__title em {
  font-style: normal;
  background: linear-gradient(102deg, var(--c-cyan) 0%, var(--c-orange) 84%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 60ch;
  color: var(--c-muted);
  font-size: clamp(15px, 1.25vw, 17.5px);
  line-height: 1.85;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 2px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  border: 2px solid var(--c-line);
  background: var(--c-line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__stats li {
  background: var(--c-panel);
  padding: 16px 14px 18px;
  border-top: 3px solid var(--c-cyan);
}

.page-about .about-hero__stats li:nth-child(2) { border-top-color: var(--c-orange); }
.page-about .about-hero__stats li:nth-child(3) { border-top-color: var(--c-magenta); }
.page-about .about-hero__stats li:nth-child(4) { border-top-color: var(--c-indigo); }

.page-about .about-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.9vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--c-ink);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--c-muted);
}

@media (min-width: 940px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(250px, .8fr);
    align-items: end;
    column-gap: clamp(32px, 5vw, 72px);
  }
}

/* ---------- 通用区块 ---------- */
.page-about .about-band {
  padding: clamp(48px, 7vw, 96px) 0;
  border-bottom: 2px solid var(--c-line);
}

.page-about .about-head {
  display: grid;
  gap: 12px;
  max-width: 74ch;
  margin-bottom: clamp(28px, 4vw, 46px);
}

.page-about .about-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 4.2vw, 50px);
  line-height: 1.12;
  letter-spacing: -.025em;
  color: var(--c-ink);
}

.page-about .about-head p {
  margin: 0;
  color: var(--c-muted);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-inline-link {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 226, 212, .45);
  padding-bottom: 1px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--c-orange);
  border-color: var(--c-orange);
}

/* ---------- 01 定位 ---------- */
.page-about .about-versions {
  display: grid;
  gap: 16px;
}

.page-about .about-version {
  border: 2px solid var(--c-line);
  background: var(--c-panel);
  padding: clamp(20px, 3vw, 30px);
  box-shadow: var(--shadow-hard);
}

.page-about .about-version--base { border-color: rgba(37, 226, 212, .55); }
.page-about .about-version--upgrade { border-color: rgba(255, 122, 26, .55); }

.page-about .about-version__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.page-about .about-version__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-quiet);
}

.page-about .about-version__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.2vw, 24px);
  letter-spacing: -.01em;
  color: var(--c-ink);
}

.page-about .about-version__text {
  margin: 0 0 16px;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-version__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-version__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-ink);
}

.page-about .about-version__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--c-cyan);
}

.page-about .about-version--upgrade .about-version__list li::before {
  background: var(--c-orange);
}

@media (min-width: 760px) {
  .page-about .about-versions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
}

/* ---------- 02 数据生产线 ---------- */
.page-about .about-pipeline__figure {
  margin: 0 0 clamp(26px, 3.6vw, 40px);
}

.page-about .about-pipeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 2px;
  display: grid;
  gap: 2px;
  background: var(--c-line);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-flow__step {
  background: var(--c-panel-2);
  padding: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-flow__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-flow__step:nth-child(2) .about-flow__num { color: var(--c-orange); }
.page-about .about-flow__step:nth-child(3) .about-flow__num { color: var(--c-magenta); }

.page-about .about-flow__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--c-ink);
}

.page-about .about-flow__step p {
  margin: 0;
  color: var(--c-muted);
  font-size: 14.5px;
  line-height: 1.85;
}

@media (min-width: 880px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 03 时间轴 ---------- */
.page-about .about-timeline__board {
  border: 2px solid var(--c-line);
  background: var(--c-panel-2);
  padding: clamp(18px, 3vw, 32px);
  box-shadow: var(--shadow-hard);
}

.page-about .about-timeline__filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-bottom: 18px;
  margin-bottom: clamp(22px, 3vw, 32px);
  border-bottom: 2px dashed var(--c-line);
}

.page-about .about-filter {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--c-muted);
  background: transparent;
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  padding: 7px 14px;
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-filter:hover {
  color: var(--c-ink);
  border-color: var(--c-cyan);
}

.page-about .about-filter:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 2px;
}

.page-about .about-filter[aria-pressed="true"] {
  color: var(--c-void);
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  font-weight: 700;
}

.page-about .about-timeline__count {
  margin: 0 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--c-muted);
}

.page-about .about-timeline__count [data-filter-count] {
  color: var(--c-orange);
  font-weight: 700;
}

.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding-left: 30px;
  position: relative;
  display: grid;
  gap: 0;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-cyan) 0%, rgba(255, 122, 26, .6) 100%);
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 clamp(24px, 3vw, 34px);
  display: grid;
  gap: 7px;
}

.page-about .about-tl__item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 14px;
  height: 14px;
  background: var(--c-void);
  border: 2px solid var(--c-cyan);
  border-radius: 50%;
}

.page-about .about-tl__item:nth-child(4n+2)::before { border-color: var(--c-orange); }
.page-about .about-tl__item:nth-child(4n+3)::before { border-color: var(--c-magenta); }

.page-about .about-tl__stage {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-orange);
}

.page-about .about-tl__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.35;
  color: var(--c-ink);
}

.page-about .about-tl__item p {
  margin: 0;
  max-width: 66ch;
  color: var(--c-muted);
  font-size: 14.5px;
  line-height: 1.85;
}

.page-about .about-timeline__figure {
  margin: clamp(26px, 3.6vw, 40px) 0 0;
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 04 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-team__body h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4vw, 46px);
  line-height: 1.12;
  letter-spacing: -.025em;
  color: var(--c-ink);
}

.page-about .about-team__body > p {
  margin: 0;
  max-width: 62ch;
  color: var(--c-muted);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-roles {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  border: 2px solid var(--c-line);
  background: var(--c-panel);
  padding: 15px 18px;
  box-shadow: 4px 4px 0 0 rgba(0, 0, 0, .7);
}

.page-about .about-role__badge {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--c-void);
  background: var(--c-magenta);
  padding: 4px 8px;
  border-radius: var(--radius);
  white-space: nowrap;
}

.page-about .about-role__title {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16.5px;
  color: var(--c-ink);
}

.page-about .about-role p {
  margin: 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.75;
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: start;
    column-gap: clamp(34px, 5vw, 66px);
  }
}

/* ---------- 05 覆盖范围 ---------- */
.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  padding: 2px;
  background: var(--c-line);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-reach__cell {
  background: var(--c-panel);
  padding: clamp(18px, 2.6vw, 28px);
  display: grid;
  gap: 8px;
  align-content: start;
  border-top: 3px solid var(--c-cyan);
}

.page-about .about-reach__cell:nth-child(2n) { border-top-color: var(--c-orange); }
.page-about .about-reach__cell:nth-child(3n) { border-top-color: var(--c-magenta); }

.page-about .about-reach__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--c-ink);
}

.page-about .about-reach__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
}

.page-about .about-reach__note {
  margin: clamp(22px, 3vw, 30px) 0 0;
  max-width: 70ch;
  color: var(--c-muted);
  font-size: 14.5px;
  line-height: 1.85;
}

@media (min-width: 700px) {
  .page-about .about-reach__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1060px) {
  .page-about .about-reach__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 06 合作生态 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: 12px;
}

.page-about .about-partner {
  border: 2px solid var(--c-line);
  background: var(--c-panel-2);
  padding: clamp(18px, 2.6vw, 26px);
  display: grid;
  gap: 10px;
  align-content: start;
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}

.page-about .about-partner:hover {
  border-color: var(--c-cyan);
  transform: translateY(-3px);
}

.page-about .about-partner h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--c-ink);
}

.page-about .about-partner p {
  margin: 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.8;
}

@media (min-width: 640px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 1040px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 07 合作路径 ---------- */
.page-about .about-paths__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-path {
  position: relative;
  display: grid;
  gap: 10px;
  align-content: start;
  text-decoration: none;
  color: inherit;
  border: 2px solid var(--c-line);
  background: var(--c-panel);
  padding: clamp(20px, 2.8vw, 28px);
  box-shadow: var(--shadow-hard);
  transition: border-color .22s var(--ease), transform .22s var(--ease), box-shadow .22s var(--ease);
}

.page-about .about-path:hover,
.page-about .about-path:focus-visible {
  border-color: var(--c-orange);
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 0 rgba(255, 122, 26, .34);
}

.page-about .about-path:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

.page-about .about-path__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-quiet);
}

.page-about .about-path__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.1vw, 22px);
  color: var(--c-ink);
}

.page-about .about-path p {
  margin: 0;
  color: var(--c-muted);
  font-size: 14.5px;
  line-height: 1.8;
}

.page-about .about-path__cta {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--c-cyan);
}

.page-about .about-path:hover .about-path__cta {
  color: var(--c-orange);
}

@media (min-width: 720px) {
  .page-about .about-paths__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

/* ---------- 结尾行动条 ---------- */
.page-about .about-outro {
  padding: clamp(44px, 6vw, 76px) 0 clamp(56px, 7vw, 96px);
  background:
    linear-gradient(120deg, rgba(37, 226, 212, .1) 0%, transparent 46%),
    linear-gradient(300deg, rgba(255, 122, 26, .12) 0%, transparent 52%),
    var(--c-void);
}

.page-about .about-outro__inner {
  display: grid;
  gap: clamp(22px, 3vw, 32px);
  align-items: center;
}

.page-about .about-outro__text h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -.025em;
  color: var(--c-ink);
}

.page-about .about-outro__text p {
  margin: 0;
  max-width: 58ch;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 900px) {
  .page-about .about-outro__inner {
    grid-template-columns: minmax(0, 1.5fr) auto;
    column-gap: clamp(32px, 5vw, 64px);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-partner,
  .page-about .about-path,
  .page-about .about-filter {
    transition: none;
  }
  .page-about .about-partner:hover,
  .page-about .about-path:hover {
    transform: none;
  }
}
<<<END>>>